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LeopoldS

The San Francisco Declaration on Research Assessment (DORA) - 1 views

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    another attempt to address impact factors
Marcus Maertens

Pouring Milk All Over Yourself: The Next Extremely Bizarre Trend? - 1 views

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    So... who is in?
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    I thought you were supposed to do this with petrol... |:-[ It's by the way cool to see how the milk seems to flow very differently from what one might expect from water: it seems to flow in a few thick streams instead of wetting the whole person... Since the surface tension of milk seems to be lower than that of water (http://journals.cambridge.org/action/displayAbstract;jsessionid=908B02C3825E97162B9D60DA615EAC96.journals?fromPage=online&aid=5146540) this is surprising. It might very well be an effect of the colloidal nature of milk as it is water in which semi-solid fat particles are suspended. So like the cornstarch mix that we have seen in the office there might be some dynamic jamming going on leading to a higher viscosity (at high shear rates). After all they might be doing science...
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    nice comment Johannes ... if you add a bit of Kleopatre, e.g. why bathing in milk helped her fool Marcus Antonius, your comment would be fully interdisciplinary :-)
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    you mean it would include History or Psychology? I would understand why Marcus Antonius might get fooled by a bathing beauty - but milk? DONKEY MILK?!? That's just wrong... :-[
johannessimon81

Most of our DNA is useless AND removing it might be feasible! - 1 views

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    Nature: Scientist have found a plant that has a very small genome because it manages to remove junk DNA.
Marcus Maertens

Human stem cells created by cloning - 3 views

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    It was about time...
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    Mwahahaha...!
Ma Ru

What happens when you take two random ACT studies and cross them over? - 3 views

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    Mobile phone-controlled cyborg cokcroaches!
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    I've seen the same thing (almost) in a Teenage Mutant Ninja Turtles episode!
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    Also good for our next app .... dock a roach onto the iss!!!!
johannessimon81

"Natural Light Cloaking for Aquatic and Terrestrial Creatures" - 3 views

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    Cheap and scalable invisibility cloaks being developed. The setup is so trivial that I would almost call it a "trick" (as in "Magicians trick"): 6 prisms of n=1.78 glass. Nontheless, it does the job of cloaking an object at visible wavelengths and from several directions.
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    can we build one?
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    Yes, I just did :-) It is on my desk
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    New video here (smaller file than previous): "https://dl.dropboxusercontent.com/u/58527156/20130613_101701.mp4" Note how close to the center of the field of view the hidden objects are. I am quite surprised that such poor lenses create such a sharp focus.
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    Well.. I would say that it is not "fully cloaking", as the image behind is mirrored as well
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    That just means that you have to double the setup, i.e., put 4 glasses in a row. Of course the obvious drawback is that you can only look at this cloak from one direction.
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    Is this really new? I don't know, but I know that the original idea of cloaking was pretty different. When cloaking as an application of transformation optics became popular people tried to make devices that work for any incidence angle, any polarization and in full wave optics (not just ray approximation). This is really hard to achieve and I guess that the people that tried to make such devices knew exactly that the task becomes almost trivial by dropping at least two of the three conditions above.
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    I think it is very easy to call something trivial when you're not the one who invested considerable time (5 min in my case) to design a cloaking device and fill the coffee mugs with water... Also, I did not really violate that many conditions: true I reduced the number of dimensions in which the device works to 1 (as opposed to the 2 dimensions of many metamaterial cloaks). However the polarization should not be affected in my setup as well as the wave phase and wave vector (so it works in full wave optics) - apart maybe from the imperfect lens distortion, but hey I was improvising.
johannessimon81

NASA-Led Study Explains Decades of Black Hole Observations - 2 views

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    Nice visualization of the structure of the accretion disk surrounding a black hole
Tom Gheysens

Silk Pavilion / MIT Media Lab - 2 views

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    biological swarm approach to 3-D printing
johannessimon81

New type of matter discovered..? - 3 views

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    Scientists may have discovered a 4-quark particle...
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    A combination of two quark-antiquark pairs could be possible, maybe strongly interacting if they are all of similar types (charm and anti-charm in this case) or it may be via gluon exchange by the strong force.. Intriguing...
Thijs Versloot

Minimagnetospheres - towards magnetic deflector shields - 1 views

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    The study gave insight that already weak magnetic fields can deflect energetic particles due to charge separation and the formation of strong electric fields
johannessimon81

Enzymes grow artificial DNA - Synthetic strands with different backbones replicate and evolve just like the real thing. - 0 views

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    Scientists have developed artificial genetic molecules with different structural backbones (XNA, TNA) and/ or a different nucleic acid alphabet. (from April 2012)
Ma Ru

Nice, eye-opening figure about wasting food - 0 views

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    "Roughly one quarter of all the water that humans take from the planet goes into food that nobody eats"... and such
Ma Ru

Goedel's Second Incompleteness Theorem Explained in Words of One Syllable - 5 views

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    "If it could be proved that two plus two is five, then it could be proved that five is not five, and then there would be no claim that could not be proved, and math would be a lot of bunk."
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    Fantastic!!!
johannessimon81

Mathematicians Predict the Future With Data From the Past - 6 views

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    Asimov's Foundation meets ACT's Tipping Point Prediction?
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    Good luck to them!!
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    "Mathematicians Predict the Future With Data From the Past". GREAT! And physicists probably predict the past with data from the future?!? "scientists and mathematicians analyze history in the hopes of finding patterns they can then use to predict the future". Big deal! That's what any scientist does anyway... "cliodynamics"!? Give me a break!
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    still, some interesting thoughts in there ... "Then you have the 50-year cycles of violence. Turchin describes these as the building up and then the release of pressure. Each time, social inequality creeps up over the decades, then reaches a breaking point. Reforms are made, but over time, those reforms are reversed, leading back to a state of increasing social inequality. The graph above shows how regular these spikes are - though there's one missing in the early 19th century, which Turchin attributes to the relative prosperity that characterized the time. He also notes that the severity of the spikes can vary depending on how governments respond to the problem. Turchin says that the United States was in a pre-revolutionary state in the 1910s, but there was a steep drop-off in violence after the 1920s because of the progressive era. The governing class made decisions to reign in corporations and allowed workers to air grievances. These policies reduced the pressure, he says, and prevented revolution. The United Kingdom was also able to avoid revolution through reforms in the 19th century, according to Turchin. But the most common way for these things to resolve themselves is through violence. Turchin takes pains to emphasize that the cycles are not the result of iron-clad rules of history, but of feedback loops - just like in ecology. "In a predator-prey cycle, such as mice and weasels or hares and lynx, the reason why populations go through periodic booms and busts has nothing to do with any external clocks," he writes. "As mice become abundant, weasels breed like crazy and multiply. Then they eat down most of the mice and starve to death themselves, at which point the few surviving mice begin breeding like crazy and the cycle repeats." There are competing theories as well. A group of researchers at the New England Complex Systems Institute - who practice a discipline called econophysics - have built their own model of political violence and
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    It's not the scientific activity described in the article that is uninteresting, on the contrary! But the way it is described is just a bad joke. Once again the results itself are seemingly not sexy enough and thus something is sold as the big revolution, though it's just the application of the oldest scientific principles in a slightly different way than used before.
johannessimon81

Sounds during sleep can boost memory - 1 views

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    For all of us who want to become smart without hard work :-D
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    Omelette du fromage?
johannessimon81

Nano-Suit Protects Bugs From Space-Like Vacuums - 0 views

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    Electron microscope studies reveal that the electron bombardment leads to polymerization of the outer layer of some insect larva's skin and protects them from dehydration. Artificial method to create this effect tested as well. Allows observation of living animals under electron microscope! Question: can the insects still breath after they are back in air? :-S
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